Statistics MCQs

Page No. 40

If in a sampling distribution of X the sample size is 25, what assumption must hold for the sampling distribution of X to be normal ?


a Population distribution is normal

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b μ1 = μx

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cPopulation distribution is uniform

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dσx = σx /√n

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For making voters lists in Pakistan we need _______________?


aSimple random sampling

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bSystematic sampling

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cQuota sampling

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dCensus

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View Answer Census

Which of the following is impossible in sampling ?


aDestructive tests

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b Heterogeneous data

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cTo make voters lists

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dNone of these

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View Answer To make voters lists

A sample estimate is used to describe a characteristic of a_____________?


aSample

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bData

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cPopulation

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dNone

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View Answer Sample

The sampling error is the_____________?


aSame as the standard error of the mean

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b Difference between the value of the sample mean and the value of the population mean

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cError caused by selecting a bad sample

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dStandard deviation multiplied by the sample size

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A sample of 24 observations is taken from a population that has 150 elements. The sampling distribution of is___________?


a.Approximately normal because is always approximately normally distributed

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b Approximately normal because the sample size is large in comparsion to the population size

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cApproximately normal because of the central limit theorem

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dNormal if the population is normally distributed

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Random samples of size 17 are from a population that has 200 elements, a mean of 36, and a standard deviation of 8. which of the following best describes the from of the sampling distribution of the sample mean for this situation ?


a Approximately normal because the sample size is small relative to the population size

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bApproximately normal because of the central limit theorem

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c Exactly

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d None of these alternatives is correct

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The difference between statistics and parameter is called:______________?


aBias

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bStandard

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cSampling error

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dboth (a) and (b)

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View Answer Sampling error

In w.o.r 2σx=_____________________?


a26/√n√N – n/N – 1

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bσ/√n√N – n/N – 1

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c26/√n N – n/N – 1

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d 26/√n

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Standard deviation of the sampling distribution of a statistics is called_____________?


a Serious error

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bDispersion

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cStandard error

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dDifference

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View Answer Standard error

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